Oak Brook, Illinois
Oak Brook estates were built for entertaining, and the current generation of lower-level projects adds a private dimension to that: recovery suites on par with what members-only clubs offer. Cedar sauna, cold plunge, steam room, heated stone floors, designed as a composed space rather than a row of equipment.
Few basement specialists serve Oak Brook seriously, and ONIT built its practice on that gap. We collaborate comfortably with interior designers, engineer the below-grade ventilation and vapor control these rooms demand, and document everything in an itemized quote. Free in-home design consultations, permits handled, licensed and insured, financing available on larger projects.
It starts with a free in-home design consultation. We measure your basement, check moisture and mechanicals, and talk through how you want the space to live. You get a design and an itemized quote, we handle permits and inspections, and one team runs the build from the first cut to the final walkthrough. Most projects take 6 to 12 weeks of construction.
Yes, and in Oak Brook we usually do. Your designer leads the aesthetic direction, materials, lighting temperature, hardware, stone, and we engineer everything behind it: sauna construction, plunge circuits and drainage, steam vapor sealing, and the ventilation system. The collaboration is documented in one itemized scope so responsibilities and costs stay clear throughout the build.
With engineering proportionate to the home. Steam rooms are built as sealed vapor envelopes, the suite is served by dedicated mechanical exhaust, and surrounding assemblies are detailed for humidity rather than hoping finishes survive it. On larger Oak Brook lower levels we also verify the HVAC actually conditions the wellness zone instead of leaving it stagnant.
A representative Oak Brook build pairs a custom clear cedar sauna, a cold plunge on a dedicated circuit with proper drainage, a steam room with bench seating, heated stone floors, and a shower and changing area, often adjacent to a gym or spa bath. Scope varies by home, which is why every project starts with a free in-home design consultation.
Tell us about your basement and we will follow up within one business day to set up an in-home visit.